In the time period when that model of shuttle was in use, Cestus III was a disputed world and the site of a massacre by the Gorn, of over 500 Federation personnel. Not to mention, its location at the farthest frontier of Federation space, means it takes weeks to travel there. Who would spend that length of time, travelling to a desolate, desert wasteland, where you're likely to be murdered by giant lizard people? And, who would design a tourism poster trying to lure people there? This poster makes no sense!